0551538 is an aftermarket upper packing manufactured by BEDFORD, used to seal the piston rod in the pump fluid section of compatible RentSpray and SprayTech airless sprayers. It replaces the OEM upper packing to restore pressure, prevent fluid bypass, and extend pump life.
| Part Number | 0551538 |
|---|---|
| Part Description | Upper Packing |
| Brand | RentSpray / SprayTech |
| Fits | RentSpray 400; SprayTech Advantage EPX2155, EPX2255 |
| Condition | New |
The 0551538 Upper Packing is a high‑quality aftermarket replacement seal manufactured by BEDFORD. It is designed to replace the OEM upper packing in the pump fluid section of RentSpray 400 and SprayTech Advantage EPX2155 / EPX2255 airless sprayers. The upper packing seals the piston rod on the pressure (outlet) side of the pump, preventing paint from bypassing the piston and ensuring full operating pressure.
Over time, the upper packing can harden, crack, or wear, leading to pressure loss, reduced flow, and poor priming. Replacing a worn packing with the BEDFORD 0551538 restores sealing performance and pump efficiency. This aftermarket part meets or exceeds OEM specifications for material compatibility and dimensional accuracy.
| Pressure sealing | Seals the piston rod during the pressure (outlet) stroke |
|---|---|
| Prevents bypass | Stops paint from leaking past the piston back to the inlet side |
| Maintains efficiency | Ensures full pump output and consistent spray pressure |
| Pressure loss under load | Sprayer cannot maintain pressure when gun is triggered |
|---|---|
| Poor priming | Pump runs but fails to draw paint or build pressure |
| Visible wear or damage | Cracked, flattened, or hardened packing during inspection |
| Routine pump rebuild | Replace upper and lower packings together during overhaul |
Part 0551538 (BEDFORD aftermarket) is compatible with the following models. Always verify with your machine's parts diagram before ordering.
| Brand / Model | Component |
|---|---|
| RentSpray 400 | Upper packing (pump fluid section) |
| SprayTech Advantage EPX2155 | Upper packing |
| SprayTech Advantage EPX2255 | Upper packing |
When replacing the upper packing, these related components are often inspected or replaced at the same time.
Replace both upper and lower packings as a set for even wear.
Inspect for scoring or corrosion; replace if damaged.
Check for deformation and replace if needed.
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